Powellite1.89 Octagon Cut 7.20 x 5.50 mm India y707
Is a Calcium Molybdenite with formula: CaMoO4
Hardness is 3.5-4 . Is very popular among mineral collectors for its fluorescence, this gem here has been photograph with normal fluorescent daylight and then with short wave UV light.This is a museum piece; cut by Luigi Mariani, a superb gem, flawless,perfect, one of the best in the world. An exceptional beauty!
From Poona, India.